Original Certificate
MSA-SS-291

SEIKITOKYU KOGYO CO., LTD.
2-9-3 Shibakoen, Minato-ku, Tokyo 105-8509, JapanJIS Q 45001:2018(ISO 45001:2018)
Certification No.: MSA-SS-291
This is to certify that the occupational health and safety management system of the above organization
meets the requirements of the applicable standard in the following areas:
Certified management system:･ Design, construction, and technical research and development forpavements and civil engineering structures･ Manufacture of asphalt mixture
Detailed information of sites/departments included in the scope of certification:

The certification number above and the following effective date arerecorded in the attached appendix.

Date of issue
Effective date
Date of expiration

20 December 201819 October 2022
26 November 2024

Date of original issue
Date of revision
Date of recertification

20 December 2018
4 October 2022
27 October 2021

Management System Assessment Center Co., Ltd.
2-2-12 Hamamatsucho, Minato-ku, Tokyo 105-0013, Japan

Shinji Fujii, President & Chief Executive
This certificate is comprised of a certificate and an appendix in electronic format.
The copyright, design, and trademark belong to MSA.
For the validity of this certificate, please email tourokubu@msac.co.jp.

Appendix to Certificate
Certification No.: MSA-SS-291
MSA-SS-291

Detailed information of sites/departments included in the scope of certification:< Same as certified scope >INTERNAL CONTROL DEPT., ADMINISTRATIVE HEAD OFFICE (CORPORATEPLANNING DEPT., COMPANY AFFAIRS & PERSONNEL DEPT., FINANCE &ACCOUNTING DEPT.)
2-9-3 Shibakoen, Minato-ku, Tokyo, Japan
BUSINESS PROMOTION HEAD OFFICE (SALES & MARKETING DEPT., U.S.
MILITARY CONSTRUCTION DEPT., INTERNATIONAL DEPT., CONSTRUCTION DEPT.,CONSTRUCTION MACHINERY & PROCUREMENT DEPT., SAFETY &ENVIRONMENTAL AFFAIRS & QUALITY CONTROL DEPT., PRODUCT BUSINESSDEPT.）TECHNOLOGY MANAGEMENT HEAD OFFICE (TECHNOLOGY DEPT.)
2-9-3 Shibakoen, Minato-ku, Tokyo, Japan< Technical research and development for pavements and civil engineering
structures >TECHNICAL RESEARCH CENTER
2081-2 Iwafunemachi-Shizuwa, Tochigi-shi, Tochigi-ken, Japan< Test and survey of pavements and civil engineering structures >KANTO TESTING LABORATORY
2081-2 Iwafunemachi-Shizuwa, Tochigi-shi, Tochigi-ken, Japan< Manufacture of asphalt mixture >RYOMO ASCON
580 Sekigawacho, Sano-shi, Tochigi-ken, JapanSAKURA FACTORY
2417-4 Ota, Sakura-shi, Chiba-ken, JapanSAIKYO ASCON
113 Shimochimagi, Asaka-shi, Saitama-ken, JapanSHINTOKYO ASCON
3-17-37 Higashikasai, Edogawa-ku, Tokyo, JapanNISHITAMA ASCON
7918-1 Tamanouchi, Oguno, Hinode-machi, Nishitama-gun, Tokyo, Japan

Date of issue
Effective date
Date of expiration

20 December 201819 October 2022
26 November 2024

Date of original issue
Date of revision
Date of recertification

This certificate is comprised of a certificate and an appendix in electronic format.
The copyright, design, and trademark belong to MSA.
For the validity of this certificate, please email tourokubu@msac.co.jp.

20 December 2018
4 October 2022
27 October 2021

(1/9)

Appendix to Certificate
Certification No.: MSA-SS-291
MSA-SS-291

Detailed information of sites/departments included in the scope of certification:< Manufacture of asphalt mixture >YOKOHAMA FACTORY
219 Kawawacho, Tsuzuki-ku, Yokohama-shi, Kanagawa-ken, JapanSAGAMIHARA RECYCLING PLANT
2500-1 Tana, Chuo-ku, Sagamihara-shi , Kanagawa-ken, Japan
KANAZAWA ASCON
4-2 Torihamacho, Kanazawa-ku, Yokohama-shi, Kanagawa-ken, JapanTOYOKORO PLANT
64-2 Reisakubetsu, Toyokoro-cho, Nakagawa-gun, Hokkaido, Japan
MUKAWA PLANT
80 Harumi, Mukawa-cho, Yufutsu-gun, Hokkaido, Japan
OSHIMA ASCON
224-10 Fujishiro, Nanae-cho, Kameda-gun, Hokkaido, JapanSAPPORO FACTORY
14-1067-3 Hassamu 10-Jo, Nishi-ku, Sapporo-shi, Hokkaido, JapanSAPPORONISHI ASCON
12-1-27 Hassamu 16-Jo, Nishi-ku, Sapporo-shi, Hokkaido, JapanSAPPORO RECYCLING PLANT
14-1067-3 Hassamu 10-Jo, Nishi-ku, Sapporo-shi, Hokkaido, Japan
AKITA ASCON
157-1 Oyachi, Iijima-Kokucho, Akita-shi, Akita-ken, JapanYUZAWA ASCON
73-1 Tsuchitoi, Sekiguchi, Yuzawa-shi, Akita-ken, JapanSENDAIIZUMI ASCON
2-5-1 Kamisakuragi, Tomiya-shi, Miyagi-ken, Japan
FUKUSHIMA FACTORY
24 Sanjimmae, Onaba, Odaka-ku, Minamisoma-shi, Fukushima-ken, Japan
FUKUSHIMA MATERIAL CENTER
24 Sanjimmae, Onaba, Odaka-ku, Minamisoma-shi, Fukushima-ken, JapanNIIGATA FACTORY5057 Masugata, Nishikan-ku, Niigata-shi, Niigata-ken, Japan

Date of issue
Effective date
Date of expiration

20 December 201819 October 2022
26 November 2024

Date of original issue
Date of revision
Date of recertification

This certificate is comprised of a certificate and an appendix in electronic format.
The copyright, design, and trademark belong to MSA.
For the validity of this certificate, please email tourokubu@msac.co.jp.

20 December 2018
4 October 2022
27 October 2021

(2/9)

Appendix to Certificate
Certification No.: MSA-SS-291
MSA-SS-291

Detailed information of sites/departments included in the scope of certification:< Manufacture of asphalt mixture >NIIGATA RECYCLING PLANT
5057 Masugata, Nishikan-ku, Niigata-shi, Niigata-ken, JapanNAGOYA FACTORY
3-27 Fujimicho, Tajimi-shi, Gifu-ken, Japan
TAJIMI PLANT
3-27 Fujimicho, Tajimi-shi, Gifu-ken, JapanNAGISO PLANT
32-1 Tadachi, Nagiso-machi, Kiso-gun, Nagano-ken, Japan
KURASHIKI ASCON113-15 Tatarazaki, Kuroishi, Kurashiki-shi, Okayama-ken, JapanFUKUOKA PLANT
710-5 Ino-Aza-Hase, Umi-machi, Kasuya-gun, Fukuoka-ken, JapanKUMAMOTO FACTORY
983-1 Sugimizu-Aza-Nagayama, Ozu-machi, Kikuchi-gun, Kumamoto-ken, JapanKUMAMOTO RECYCLING PLANT
983-1 Sugimizu-Aza-Nagayama, Ozu-machi, Kikuchi-gun, Kumamoto-ken, Japan
YAMATO PLANT
1913 Omine-Aza-Rokutan, Yamato-cho, Kamimashiki-gun, Kumamoto-ken, Japan< Design and construction of pavements and civil engineering
structures/Manufacture of asphalt mixture >HOKKAIDO BRANCH OFFICE
5-8-5 Kita 7-Jo-Nishi, Kita-ku, Sapporo-shi, Hokkaido, JapanTOHOKU BRANCH OFFICE
2-3-10 Honcho, Aoba-ku, Sendai-shi, Miyagi-ken, Japan
HOKURIKU BRANCH OFFICE
1-3-11 Benten, Chuo-ku, Niigata-shi, Niigata-ken, JapanNAGOYA BRANCH OFFICE
5-24-32 Imaike, Chikusa-ku, Nagoya-shi, Aichi-ken, Japan

Date of issue
Effective date
Date of expiration

20 December 201819 October 2022
26 November 2024

Date of original issue
Date of revision
Date of recertification

This certificate is comprised of a certificate and an appendix in electronic format.
The copyright, design, and trademark belong to MSA.
For the validity of this certificate, please email tourokubu@msac.co.jp.

20 December 2018
4 October 2022
27 October 2021

(3/9)

Appendix to Certificate
Certification No.: MSA-SS-291
MSA-SS-291

Detailed information of sites/departments included in the scope of certification:< Design and construction of pavements and civil engineering
structures/Manufacture of asphalt mixture >KANSAI BRANCH OFFICE
7-8 Nozakicho, Kita-ku, Osaka-shi, Osaka, Japan
CHUSHIKOKU BRANCH OFFICE
1-23 Kyobashicho, Minami-ku, Hiroshima-shi, Hiroshima-ken, JapanKYUSHU BRANCH OFFICE
1-11-5 Hakataeki Higashi, Hakata-ku, Fukuoka-shi, Fukuoka-ken, Japan< Design and construction of pavements and civil engineering structures >DOOU BRANCH
4-2-1 Yonesato 1-Jo, Shiroishi-ku, Sapporo-shi, Hokkaido, JapanOBIHIRO OFFICE
64-2 Reisakubetsu, Toyokoro-cho, Nakagawa-gun, Hokkaido, JapanKOSHIMIZU OFFICE
144-1 Nakasato, Koshimizu-cho, Shari-gun, Hokkaido, JapanATTOKO OFFICE
2-125 Attoko, Nemuro-shi, Hokkaido, JapanDONAN BRANCH
80 Harumi, Mukawa-cho, Yufutsu-gun, Hokkaido, Japan
OSHIMA OFFICE
224-10 Fujishiro, Nanae-cho, Kameda-gun, Hokkaido, Japan
IWATE BRANCH2-19-9 Kado, Morioka-shi, Iwate-ken, Japan
HANAMAKI OFFICE
2-2 Dai 15-Chiwari, Ishidoriyacho-Kochi, Hanamaki-shi, Iwate-ken, JapanSANRIKU OFFICE
1-5-12-1 Nishimachi, Miyako-shi, Iwate-ken, JapanMIYAGI BRANCH
2-6-30 Kasuminome, Wakabayashi-ku, Sendai-shi, Miyagi-ken, Japan

Date of issue
Effective date
Date of expiration

20 December 201819 October 2022
26 November 2024

Date of original issue
Date of revision
Date of recertification

This certificate is comprised of a certificate and an appendix in electronic format.
The copyright, design, and trademark belong to MSA.
For the validity of this certificate, please email tourokubu@msac.co.jp.

20 December 2018
4 October 2022
27 October 2021

(4/9)

Appendix to Certificate
Certification No.: MSA-SS-291
MSA-SS-291

Detailed information of sites/departments included in the scope of certification:< Design and construction of pavements and civil engineering structures >FURUKAWA BRANCH
6-3-20 Furukawaekimaeodori, Osaki-shi, Miyagi-ken, JapanKUROKAWA OFFICE
2-5-1 Kamisakuragi, Tomiya-shi, Miyagi-ken, Japan
AOMORI BRANCH
124-1 Namioka-Aza-Wakamatsu, Namioka, Aomori-shi, Aomori-ken, JapanHACHINOHE OFFICE
5-5-43 Hibakari, Hachinohe-shi, Aomori-ken, Japan
AKITA BRANCH
157-1 Oyachi, Iijima-Kokucho, Akita-shi, Akita-ken, JapanYUZAWA BRANCH
73-1 Tsuchitoi, Sekiguchi, Yuzawa-shi, Akita-ken, Japan
YOKOTE OFFICE
121 Okamizakai, Kamizakai, Yokote-shi, Akita-ken, JapanYAMAGATA BRANCH
1-5-30 Emata, Yamagata-shi, Yamagata-ken, Japan
SAKATA OFFICE
1-1-23 Kamiyasucho, Sakata-shi, Yamagata-ken, Japan
FUKUSHIMA BRANCH
1-1 Takenouchi, Hiwadamachi, Koriyama-shi, Fukushima-ken, JapanMINAMISOMA BRANCH
24 Sanjimmae, Onaba, Odaka-ku, Minamisoma-shi, Fukushima-ken, JapanJOETSU BRANCH
4389-1 Kamichihara, Joetsu-shi, Niigata-ken, JapanNIIGATA BRANCH
1478 Sone, Nishikan-ku, Niigata-shi, Niigata-ken, JapanTOYAMA BRANCH
175-1 Tsukahara, Toyama-shi, Toyama-ken, JapanKITAKANTO BRANCH OFFICE
2-1-1 Takasago, Urawa-ku, Saitama-shi, Saitama-ken, Japan

Date of issue
Effective date
Date of expiration

20 December 201819 October 2022
26 November 2024

Date of original issue
Date of revision
Date of recertification

This certificate is comprised of a certificate and an appendix in electronic format.
The copyright, design, and trademark belong to MSA.
For the validity of this certificate, please email tourokubu@msac.co.jp.

20 December 2018
4 October 2022
27 October 2021

(5/9)

Appendix to Certificate
Certification No.: MSA-SS-291
MSA-SS-291

Detailed information of sites/departments included in the scope of certification:< Design and construction of pavements and civil engineering structures >SAITAMAHIGASHI BRANCH
8-9-9 Higashiurawa, Midori-ku, Saitama-shi, Saitama-ken, JapanSAITAMANISHI BRANCH
22-1 Fujimicho, Kawagoe-shi, Saitama-ken, JapanKITAKANTO BRANCH
612-1 Sekigawacho, Sano-shi, Tochigi-ken, JapanGUMMA OFFICE
257-1 Asakuramachi, Maebashi-shi, Gumma-ken, JapanHIGASHIKANTO BRANCH OFFICE
1106 Muratacho, Chuo-ku, Chiba-shi, Chiba-ken, JapanCHIBA BRANCH
1106 Muratacho, Chuo-ku, Chiba-shi, Chiba-ken, JapanKEIYO BRANCH
1-33-8 Surugadai, Funabashi-shi, Chiba-ken, Japan
TOKATSU BRANCH
4-5-15 Shibasakidai, Abiko-shi, Chiba-ken, Japan
IBARAKI OFFICE
655 Kakuraicho, Mito-shi, Ibaraki-ken, JapanTOKYO BRANCH OFFICE
42-6 Udagawacho, Shibuya-ku, Tokyo, Japan
RAILWAY CONSTRUCTION BRANCH
1-48-21 Suenaga, Takatsu-ku, Kawasaki-shi, Kanagawa-ken, JapanTOKYOHIGASHI BRANCH
4-6-7 Higashikasai, Edogawa-ku, Tokyo, JapanTOKYONISHI BRANCH
1-8-11 Iwadominami, Komae-shi, Tokyo, JapanSHIBUYA BRANCH
42-6 Udagawacho, Shibuya-ku, Tokyo, Japan
TAMA BRANCH
2-1-12 Shimmei, Hino-shi, Tokyo, Japan

Date of issue
Effective date
Date of expiration

20 December 201819 October 2022
26 November 2024

Date of original issue
Date of revision
Date of recertification

This certificate is comprised of a certificate and an appendix in electronic format.
The copyright, design, and trademark belong to MSA.
For the validity of this certificate, please email tourokubu@msac.co.jp.

20 December 2018
4 October 2022
27 October 2021

(6/9)

Appendix to Certificate
Certification No.: MSA-SS-291
MSA-SS-291

Detailed information of sites/departments included in the scope of certification:< Design and construction of pavements and civil engineering structures >NISHITAMA BRANCH
3-4-29 Matsubaracho, Akishima-shi, Tokyo, Japan
DEVELOPMENT CONSTRUCTION BRANCH
42-6 Udagawacho, Shibuya-ku, Tokyo, Japan
YOKOHAMA BRANCH OFFICE
22 Yamashitacho, Naka-ku, Yokohama-shi, Kanagawa-ken, Japan
YOKOHAMA BRANCH
3-1-31 Edaminami, Tsuzuki-ku, Yokohama-shi, Kanagawa-ken, Japan
KONAN BRANCH
9-27-6 Konandai, Konan-ku, Yokohama-shi, Kanagawa-ken, Japan
KENOH BRANCH
5-10-2 Okata, Atsugi-shi, Kanagawa-ken, JapanSHIZUOKA BRANCH
136-10 Kawashimata, Gotemba-shi, Shizuoka-ken, JapanITO OFFICE
1110-36 Futatsuka, Yawatano, Ito-shi, Shizuoka-ken, JapanSHIMODA OFFICE
2-8 Higashihongo, Shimoda-shi, Shizuoka-ken, JapanNAGOYA BRANCH
13-5 Ohayashi, Kagiyamachi, Tokai-shi, Aichi-ken, JapanMIE BRANCH
296 Tomitane, Kisosaki-cho, Kuwana-gun, Mie-ken, Japan
GIFU OFFICE
3-27 Fujimicho, Tajimi-shi, Gifu-ken, JapanKISO BRANCH
3671 Yomikaki, Nagiso-machi, Kiso-gun, Nagano-ken, JapanOSAKA BRANCH
1-25-3 Sangamaki, Takatsuki-shi, Osaka, Japan
KOBE BRANCH
4-2096-3 Kitabefu, Nishi-ku, Kobe-shi, Hyogo-ken, Japan

Date of issueEffective date
Date of expiration

20 December 201819 October 2022
26 November 2024

Date of original issue
Date of revision
Date of recertification

This certificate is comprised of a certificate and an appendix in electronic format.
The copyright, design, and trademark belong to MSA.
For the validity of this certificate, please email tourokubu@msac.co.jp.

20 December 2018
4 October 2022
27 October 2021

(7/9)

Appendix to Certificate
Certification No.: MSA-SS-291
MSA-SS-291

Detailed information of sites/departments included in the scope of certification:< Design and construction of pavements and civil engineering structures >NARA BRANCH
1137-1 Nukatabe-Kitamachi, Yamatokoriyama-shi, Nara-ken, JapanOSAKAMINAMI OFFICE
1-25-3 Sangamaki, Takatsuki-shi, Osaka, Japan
OKAYAMA BRANCH
324-1 Tsudaka, Kita-ku, Okayama-shi, Okayama-ken, Japan
KURASHIKI OFFICE
2059 Tsubue, Kurashiki-shi, Okayama-ken, JapanHIROSHIMA BRANCH
1-12-25 Midorii, Asaminami-ku, Hiroshima-shi, Hiroshima-ken, Japan
IWAKUNI OFFICE
1-1-17 Motomachi, Iwakuni-shi, Yamaguchi-ken, JapanSHIKOKU OFFICE
891-2 Kinseicho-Yamadai, Shikokuchuo-shi, Ehime-ken, JapanKUMAMOTO BRANCH
983-1 Sugimizu-Aza-Nagayama, Ozu-machi, Kikuchi-gun, Kumamoto-ken, Japan
YAMATO OFFICE1913 Omine-Rokutan, Yamato-cho, Kamimashiki-gun, Kumamoto-ken, JapanFUKUOKA BRANCH
2-8-39 Nakahata, Onojo-shi, Fukuoka-ken, JapanMIYAZAKI BRANCH
1370-4 Komatsu-Aza-Yatsugakubo, Miyazaki-shi, Miyazaki-ken, JapanKAGOSHIMA BRANCH
4549-2 Chirancho-Nishimoto, Minamikyushu-shi, Kagoshima-ken, Japan
OKINAWACHUBU BRANCH
5-2-2 Oyama, Ginowan-shi, Okinawa-ken, Japan
OKINAWAHOKUBU OFFICE
8036-10 Kin, Kin-cho, Kunigami-gun, Okinawa-ken, Japan

Date of issue
Effective date
Date of expiration

20 December 201819 October 2022
26 November 2024

Date of original issue
Date of revision
Date of recertification

This certificate is comprised of a certificate and an appendix in electronic format.
The copyright, design, and trademark belong to MSA.
For the validity of this certificate, please email tourokubu@msac.co.jp.

20 December 2018
4 October 2022
27 October 2021

(8/9)

Appendix to Certificate
Certification No.: MSA-SS-291
MSA-SS-291

Detailed information of sites/departments included in the scope of certification:< Machinery management related to certified scope >CONSTRUCTION MACHINERY CENTER
582-2 Iwafunemachi-Shizuwa, Tochigi-shi, Tochigi-ken, Japan< Manufacturing management of metropolitan area asphalt mixture >KANTO PRODUCT SALES & MARKETING BRANCH OFFICE
2-9-3 Shibakoen, Minato-ku, Tokyo, Japan

Date of issue
Effective date
Date of expiration

20 December 201819 October 2022
26 November 2024

Date of original issue
Date of revision
Date of recertification

This certificate is comprised of a certificate and an appendix in electronic format.
The copyright, design, and trademark belong to MSA.
For the validity of this certificate, please email tourokubu@msac.co.jp.

20 December 2018
4 October 2022
27 October 2021

(9/9)